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Use of Micro Geared Motor
- Jan 15, 2019 -

Miniature geared motors are small in size and capacity, and require a special motor for motors and applications, performance and environmental conditions with output powers typically below a few hundred watts. Full name micro special motor, referred to as micro motor. Commonly used in control systems to achieve the function of detecting, solving, amplifying, executing or converting electromechanical signals or energy, or for transmitting mechanical loads.


Micromotors can be roughly classified into three categories in terms of structure:



The basic composition is similar to that of an ordinary motor, including stators, rotors, armature windings, brushes, etc., but the structure is extremely compact.



There are two common types: a combination of a micromotor and an electronic circuit of the above various micromotors. For example, a combination of a DC motor and a sensor, a combination of an X-direction and a Y-direction linear motor, and the like.



The outer structure is the same as the electromagnetic type. For example, the rotary products are made into a cylindrical shape, and the linear products are formed into a square shape, but the internal structure differs greatly depending on the working principle.


The performance of various types of micro-motors varies greatly, and its performance parameters are difficult to clarify. In general, the micro-motors used for driving machinery that focus on the energy and energy at the time of operation and start-up are considered to be power supply. The micro-motors for output power, waveform and stability control are biased towards static and dynamic characteristic parameters. The characteristic parameters of the first two types of motors are similar to those of ordinary motors. Only the control micromotor has its unique characteristic parameters.


Working characteristics.

Commonly used output and input, or the relationship between one output and the other. From the control requirements, the static characteristic curve should be continuous and smooth, and there is no common frequency curve or response curve for the sudden change of dynamic characteristics. The frequency curve should be stable, and the response curve of the non-bounce oscillation point should converge quickly.



Corresponds to the size of the output of the unit input signal. Generally, it is expressed by specific torque, specific electromotive force, amplification factor, and the like.




Under certain input conditions, the difference between the actual value of the output signal and the theoretical value represents the accuracy of the micro-motor, which is represented by the commonly used error magnitude.


Impedance or resistance.

In the system, the input and output impedance of the micro motor should be matched with the corresponding circuit to ensure the running performance and accuracy of the system.



Not only is the special requirement for controlling micromotors, but also for driving micromotors and power micromotors. The parameters such as service life, failure rate, reliability and mean time between failures are used to characterize the operational reliability of the micro-motor.



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